Water Pressure Sensor Saunier Duval Themafast F 25 E H MOD Ref. S57205

Saunier Duval boilers compatible with reference S57205

Pressure sensor with reference S57205. 41 verified compatibilities: C24EV and C28E.

Verified compatibility

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

How to check if ref. S57205 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference S57205. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms that require diagnosis in the pressure switch S57205

The pressure sensor measures the water pressure for the electronics. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler intermittently locks out, sometimes it does and sometimes it doesn't, with no clear relation to usage.

  Cause: A pressure switch with unstable contact gives readings that sometimes drop below the minimum and cause a lockout.

  Note the time and frequency of the blockage; if it does not coincide with actual visible pressure drops on the manometer, the sensor is the first suspect.

• 02

  The pressure indicator or icon on the display is flashing or turning on intermittently.

  Cause: Indicate that the signal coming from the sensor oscillates around the warning threshold, which is typical of a sensor that is starting to fail.

  Check that the fitting or tube connecting the collector to the water circuit is not scaled or partially blocked.

• 03

  After filling the circuit, the boiler still does not start, as if it has not detected the added water.

  Cause: If the sensor does not update the reading, the PCB continues to see insufficient pressure even though the circuit is already charged.

  Check the pressure with the boiler's manometer after filling; if it reads correctly but the fault continues, the sensor is not communicating the change.

Fault codes Saunier Duval that require diagnosis

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Data sheet for Saunier Duval pressure sensor S57205

Catalogue reference

S57205

Uniclima internal SKU

CPTF25EHMOD

Brand

Saunier Duval

Type of part

Pressure sensors

Units in stock

4 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Batch number

120521 B

Secondary code on the label

0020016532